The development of third molar impaction and its prevention.
D006801:Humans; D008964:Molar, Third / Q000473:pathology* / Q000502:physiology; D014078:Tooth Eruption; D014081:Tooth Extraction; D014092:Tooth Root / Q000502:physiology; D014095:Tooth, Impacted / Q000209:etiology* / Q000517:prevention & control; D014097:Tooth, Unerupted / Q000502:physiology